Mailing lists generators

[Ben Russell]

Hi,

What are some on-line list building options?  I've used propstream, but I would like to find something that is just a pay per list, not monthly fee.

Second, are there any tools that allow you to search for individuals that have owned multiple properties over a given period of time?  Not that they currently own multiple properties, but they have in the past. For example they owned 5 homes over the past 10 years. 

thanks.